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THE EDITOR RESPONDS: According to the National Institute of Neurological Disorders and Stroke, the cause of Lewy body dementia remains unknown. Some speculate that genetics plays a role, and studies are underway to investigate this possibility. Please see “The Other Dementias” on page 26 of the November/December 2009 issue for more information on Lewy body dementia, frontotemporal dementia, and vascular dementia. You might also contact the Association for Frontal Temporal Dementias online at FTD-Picks.org or by phone at 267-514-7221 or 866-507-7222.